Outbreak of ISA during first feeding of salmon fry ( Salmo salar )
Nylund, A., Krossoy, B., Devold, M., Aspehaug, V., Steine, N.O. and Hovland, T.
Bull. Eur. Ass. Fish Pathol.
70 - 74
The first case of ISA during first feeding in Atlantic salmon fry is described. The presence of ISA virus is shown with the help of cell cultures (ASK-cells), IFAT, RT-PCR and transmission electron microscopy. The possibility that this may be a case of vertical transmission is discussed, but it is argued that the ISA virus may have entered the hatchery through an as yet unidentified route.